Digital signature method, digital signature system and quantum key card

Abstract

The invention discloses a digital signature method, a digital signature system and a quantum key card. The digital signature system comprises quantum network service stations, signature client sides, authentication client sides and quantum key cards, wherein the quantum network service stations are configured on the network side, and the signature client sides and the authentication client sides are configured on the user side. The digital signature method includes that a true random number is generated on the network side and then stored in the corresponding quantum key card and on the network side respectively to form a corresponding user-side key; the quantum key card matching with the signature client side uses the stored user-side key to generate a signature file, the signature file is sent to the authentication client side via the signature client side, and the authentication client side sends the received signature file to the current quantum network service station, acquires the corresponding user-side key from the network side to perform signature authentication on the signature file and sends signature authentication results to the corresponding authentication client side. The digital signature method, the digital signature system and the quantum key card have the advantage that key seeds are stored in the quantum key cards and the quantum network service stations, so that the problems of access use and safety of quantum network terminals are solved.

Description

technical field [0001] The invention belongs to the technical field of quantum communication, and in particular relates to a digital signature method and system based on quantum random number and quantum key distribution. Background technique [0002] Signature and signature recognition are an indispensable part of daily social life and economic transactions. Traditional signatures are operations such as writing signatures or stamping on paper documents to indicate that the document has been confirmed by the parties. It has certain legal effect. In today's society with the rapid development of information technology and the Internet, human beings have begun to enter the paperless era, and more and more transactions are completed on the Internet, and continuing to use the traditional signature method can no longer meet the needs of the society. [0003] As an effective and feasible method, digital signature technology is widely used to solve the security problem of informati...

AI Technical Summary

Problems solved by technology

[0004] Today's mainstream digital signature method is based on the public key system, that is, using asymmetric algorithms to digitally sign information, but the public key cryptosystem is based on the complexity of mathematical calculations to ensure the security of information. With the development of quantum computing technology development, the security of the asymmetric algorithm it adopts will be greatly threatened, and the asymmetric key encryption and decryption speed is slow, the authentication efficiency is low, and it is not suitable for large-scale promotion and use

Symmetric key algorithms can also be used to implement digital signatures. Compared with asymmetric key algorithms, they have the advantages of less resource consumption and faster operation speed, but it is difficult for symmetric key algorithms to solve the key distribution problem. The most common method is The symmetric key is pre-stored on both sides, but there is a risk of leakage and cracking if the same set of symmetric key is used for a long time. For this reason, the patent document with the publication number CN101282222A proposes a method of using combined symmetric key technology to realize digital signature , which uses the pre-stored seed key combined with the key generation algorithm to achieve the effect of changing the signature key one at a time. Although this method is slightly more secure than the previous method of directly using the pre-stored key to achieve encryption and decryption, its seed key It will not be updated, and there is still a risk of being cracked after multiple uses

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